At the time, police said Richard Arjona, 39, was involved in an altercation at the apartment complex and fired several shots toward people. He then fled the scene and called police, according to arrest reports.

Arjona was charged with multiple felonies, including aggravated assault with a deadly weapon and shooting into an unoccupied structure.

Arjona said he fired his weapon in self-defense and that somebody else had been firing at him.

The State Attorney's office could not prove beyond a reasonable doubt that he had committed a crime, said Todd Brown, spokesman for the office.

A second firearm and further physical evidence at the scene determined that there had been a second shooter in the incident, according to Brown. That, along with conflicting witness accounts, raised enough doubt.

"Ultimately the State did not believe it would be able to refute the defendant’s claim of self-defense based on the available evidence in this case," Brown said in an email.